One of numerous hardy large-leaved rhododendrons developed by Anthony Shammarello of Euclid, Ohio, this hybrid of R. catawbiense 'Album' bears large spherical trusses of white funnel-shaped blooms in mid- to late spring. Each flower has a bold yellow blotch on its upper lobe. The large vigorous upright plants have long leathery dark-green leaves.
This beautiful evergreen shrub prefers partial shade and humus-rich, acid, moist, well-drained soil. Plant it shallowly and mulch...
Gerald L. Klingaman
Hybridized by its namesake, who also developed most of the Glenn Dale Hybrids, this dense broad evergreen azalea bears showy clusters of large yellowish-pink flowers with irregular white margins. The wavy-edged, flaring, funnel-shaped flowers are highlighted by a bright red blotch on their upper lobes. After their mid-spring bloom, the flowers drop rather than persisting on the plant. This chest-high shrub has elliptic medium-green leaves, which turn coppery in cold weather.
Like most other azaleas,...
Dense clusters of fragrant rose-pink funnel-shaped flowers adorn this Knap Hill Hybrid azalea in late spring, before the foliage has fully emerged. Each bloom bears an orange blotch on its upper petal. This upright open medium-sized shrub has elliptical leaves that color nicely in fall.
Developed in the late nineteenth and early twentienth centuries at the famed Knap Hill Nursery in England, Knap Hill Hybrids are deciduous azaleas whose ancestry includes the Ghent and Molle hybrids and several...
(Betty Anne Voss Azalea, Evergreen Azalea, Robin Hill Azalea)
Azalea ‘Betty Anne Voss’ bears large blooms of bright pink-purple with darker spots on the throat in the late spring. The flowers are double, hose-in-hose (two sets of petals, one inside the other), widely funnel-shaped and have frilly edges. The plants are dwarf, rounded and dense. Evergreen leaves are narrowly elliptic, glossy and dark green.
Robin Hill hybrid azaleas are a large group of evergreen shrubs that were hybridized in New Jersey by chemist and rhododendron enthusiast, Robert Gartrell....
(Bibiani Rhododendron, De Rothschild Hybrid Rhododendron, Rhododendron)
Valued for its symmetrical rounded habit, its handsome evergreen leaves, and its showy blooms, this large hybrid rhododendron bears numerous dense spherical clusters of glowing deep-red flowers in early spring. The waxy, broadly funnel-shaped blooms have sparse purple spotting. The large elliptic deeply veined leaves are rich green with silvery undersides.
This relatively heat-tolerant rhododendron prefers partial shade and highly organic acid soil that is evenly moist but well-drained. Give...
(Billie Dee Azalea, Evergreen Azalea)
Introduced by Hines Nursery of Irvine, California, this tender evergreen azalea results from crosses among Belgian Indica Hybrids and other hybrid azaleas. It bears a profusion of large single rose-purple blooms in 5- to 10-flowered clusters from late winter to early spring. The wide-flaring, wavy-edged, funnel-shaped blooms have pale lilac throats. This compact upright cultivar forms a waist-high shrub that is somewhat broader than tall. The small hairy lance-shaped leaves are glossy-green. Although...
Gerald L. Klingaman
(Blaauw's Pink Azalea, Evergreen Azalea)
One of the hardiest Kurume Hybrid azaleas, ‘Blaauw’s Pink’ blooms heavily early in the season. The flowers are soft salmon pink with dark rose flecks on their upper lobes.
They are hose-in-hose, giving the appearance of two flowers stacked. The small oval leaves are glossy dark green. This dense compact plant slowly forms a rounded waist-high shrub.
The Kurume Hybrids result from some 300 years of hybridizing in Japan. Their ancestry likely includes Rhododendron kaempferi, R....
(Blitz Rhododendron, Clark Hybrid Rhododendron, Rhododendron)
Valued for its compact rounded habit, its handsome evergreen leaves, and its showy blooms, this hybrid of Rhododendron haematodes bears loose spherical clusters of glowing deep-red flowers in mid-spring. The ruffled, broadly funnel-shaped blooms have inconspicuous brownish spotting. The elliptic dark green leaves have tan undersides.
Like most rhododendrons, 'Blitz' prefers partial shade and highly organic acid soil that is evenly moist but well-drained. Plant it shallowly and mulch...
(Blue Boy Rhododendron, Rhododendron, Watson Hybrid Rhododendron)
Remarkable for both the color and the abundance of its flowers, this hybrid rhododendron bears large spherical clusters of blue-purple flowers in late spring. The ruffled, broadly funnel-shaped blooms have a prominent black-purple blotch on their upper lobes. The upright head-high plants are furnished with long elliptic dark green leaves.
Like most rhododendrons, 'Blue Boy' prefers partial shade and highly organic acid soil that is evenly moist but well-drained. Plant it shallowly and mulch...
(Blue Diamond Rhododendron, Crosfield Hybrid Rhododendron, Rhododendron)
One of the few rhododendrons whose flowers approach blue, this 1939 introduction bears showy spherical clusters of wide-flaring, flat, bright lavender flowers from early to mid-spring. This dense, upright, chest-high shrub has small elliptic dark green leaves that go bronze in winter. It was hybridized by J. J. Crosfield of Embley Park, England.
Like most rhododendrons, 'Blue Diamond' likes chilly winters, moderate summers, and highly organic, well-drained, acid soil. It departs from the norm,...